Intense brainwashing by the biological father and sisters: We are the new stepfather's sex toys. Kitaoka Karin, Tenma Yui, PRED-759

The older sister, Wei, was attentive and did excellent housework, while the younger sister, Guolin, was docile and easily influenced. The two lived a carefree life with their mother's remarried partner, their wealthy adoptive father. However, during their mother's hospitalization, the nightmare began… The once gentle adoptive father suddenly became ruthless, revealing his lust and coercing the sisters. The easily influenced younger sister was manipulated into sex through sweet talk and flattery. The strong older sister was forcibly impregnated. Exploiting their personality differences, he controlled their minds and bodies. Unbeknownst to them, the two became like submissive bitches, vying to serve their adoptive father. "Our only value is to become our adoptive father's sacs of pregnancies. I'll go first, I'll go first…!" These were the only thoughts in their minds, so deeply brainwashed…